Qidian will find it very difficult to take action against if you are not living in China, not a Chinese national, have no assets in China or connected and have the authors permission right? Specially if you are an independent translator who is translating free of charge and not a part of a translating organisation.

Please please please don’t sign with them. Most of Chinese contracts are restrictive and have sooo much of unfair terms. Nothing against the country lol, but legal relations with China is a nightmare. Unless you sign with them or verbally agree they cannot do much against you.